Printing-telegraph receiver.



A. P. DIXON. PRINTING TELEGRAPH RECEIVER. APPLICATION FILED JAN. 9, 1913.

1 1M533 38, Patented July 14:, 1914.

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Tm r i n sca ti TIN a if ilt lha'tlf l F AMOS F. DIXQN, F NEWARK, NEVJ JERSEY, ASSIGNOR TO WESTERN ELECTRIC- COMPANY, 9F NEW YORK, N. Y A'CORPORATION OF ILLINOIS.

PitINTING-TELEG-RAPH RECEIVER.

' Application filed January 9, 191

",vherein the type selections and the various other necessary operations are controlled by a plurality of current impulses imparted over a single line conductor.

The object of this invention to provide a receiver of the above class wherein all the necessary functions are performed in a reliable and efiicient manner at a high rate of speed.-

To the above end, means are provided for distributing a series o'f'current impulses to a plurality of type selecting magnets and operation controlling relays. A rotatable type shaft carrying the characters is like wise provided, together with a plurality of magnet controlled members which by changes in their relative location secure the positioning of the type shaft to print any desired character.

This invention. will be fully understood from the following description taken in con nection withthe accompanying drawingin which the system of connections is shown diagrammatically, and so much of the apparatus as is necessary to a complete understanding of the. device is shown in perspec' tive.

The system herein disclosed is operated preferably by various combinations of live positive and negative impulses. The impulses arriving over a main line conductorL from a distant transmitting station pass through the windings of a polarized relay 1 to ground. The relay 1 provided with an armature 2 connected to a grounded source upon its attraction l an impulse of the proper polarity, to on it. a front contact 4. The contact a" is connected to a conducting ring 5) ot a current distributor 6 provided with a ro tatable arm 7 which is driven by a suitable source of power in the direction of the arrow. The arm 'I is provided with a. pair Specification of Letters Patent.

Patented July 14, this Serial no. 741,119.

of outer insulated contact brusheswhich are adapted to make engagement with a series of commutator bars 11, 12, 13, 14 and 15, connecting them consecutively with thering 5. The arm 7 is likewise provided with a pair of inner insulated contactbrushes engaging a current distributing ring 8, which connected to a grounded source of energy 9, and'a series of commutator bars 10. Arm 7 is constantly rotated, by any desired means, at such a velocity that the outer pair of brushes is interconnecting the first commutator bar of a set with ring 5 upon the receipt of the first impulse of a combination from the transmitting station; the second bar and ring 5 upon the receipt of a second impulse, etc, throughout the'cycle of impulses for each selection." This synchronous movement and the means for accomplishing it are well known in the art and will not be further described. AS the arm 7 rotates about its axis, battery is therefore connected consecutively to the various commutator bars 11, 12, 13, 14 and 15by the outer set of brushes when the armature of relay 1 is against the front contact l,

and to the commutator bars 10 by the inner of brushes.

in the diagrammatic representation of the circuit shown, only one receiving inunient is connected to the current distributer 6, although it is readily understood that other receiving instruments may be similarly connectedto the idle commutator bars so that a number of instruments may be operated. to receive several distinct mesbeing transmitted over the single line conductor la. p

The commutator bars 11, 12, 13, 14 and 15 are connected respectively to relays 21, 523, 224i and which control the required operations, with the exception of the type selections, and to type selecting magnets 31,

32, 33, 34 and 35, by means of branch cond'uctors 36, 37, 38, 39 and 40.

A type wheel on which the characters are located in a double row is carried by a rotatable type shaft 46 which may be driven as hereinafter described by a spring 47 in the direction shown by the arrow.

The spring 47 is kept under tension by means or a motor 4-8. Concentrically with the type shaft 46 are five movable disks 51, 52, 53, 5,4 and 55, each ofwhich. is provided 66 carried by the type shaft 46. Each .of

the selecting magnets 31, 32, 33, 34 and 35 is provided with a spring ten'sioned armature 70, having a lever 71 which is connected to one of the aforementioned disks 51, 52, 53, 54 and 55 respectively. Thus,when the armature of any of the type selecting magnets is attracted, the corresponding disks are moved through'a small angle and whenever one or more of the disks are moved so that a continuous vertical line of notches ispresented to one of the levers 65, the spring thereof tends to force the inner end of the corresponding'lever upward into a position to be engaged by the rotating arm 66. The type wheel may thereby be arrested in a position to-present any desired character to the printing platen.

The levers 65 are restored to their original position and there held between character selections by release levers 72 and 73 pivoted .at 74 and '75, and having the centrally pro-. jectlng ends thereof normally lowered, to depress said levers 65, by means of springs 76 and 77. -'Upon the energization of recurrent thus passing'through ,the'variouslease magnets 78. and 79, however, the magnetic pull overcomes the spring tension and the centrally projecting ends of the release levers 72 and 73 areraised, releasing all of the type selecting levers 65, only one of which, however, may become operative. Each of the-operation controlling relays 21, 22, 23, 24 and 25, starting relay 26, the selecting magnets 31, 32, 33, 34 and 35,,and the release magnets 78 and 79 is provided with'a holding winding which receives current through. the back contacts and the armatures of a clearing out relay 80. The circuit for the magnets may be traced from ground at selecting magnet 35 through magnets 34,

78, 33, 32, 79 and 31 in series in the order named, the right hand armature of the clearing out relay 80 to battery 81 and ground. The circuit for the relays maybe traced from grounded battery 81, left hand armature of clearing. out relay 80, holding windings of relays 26, 25, 24, 23, 22 and. 21 in series in the order named to ground. The

magnets and relays assists the operating windings thereof in pulling up the respective armatures, thereby increasing the rapidity of operation, and is suflicient to hold the armatures in attracted position aftervthe operating current is removed. Upon the energization of the'clearing out reiav 80, the circuit'of' the holding coilsis broken and the displaced armatures of the relays and type selecting'magnets are restored to normal position by the retracting springs thereof.

A sufiicient description of the system and apparatus may be obtained from a description of a particular type selection and the v various operations such as the spacing, line lowing order: positive, negative, negative,

positive, negative. Upon the receipt of the first impulse, the outer brushes of the arm 7 of the distributer connect the commutator distant station, the arm 7 is moved by its a source of power to the next succeeding segment. Assuming that the polarized relay 1 attractsits armature only upon the receiptof positive current, it will be understood that upon the receipt of the first impulse in the selection of character D, the armature 2 is attracted against its front contact 4 and current will flow from grounded battery 3', con tact 4, rin 5, commutator bar 11, conductor 36, in multiple through relay 21 and select ing magnet 31 to ground. Both'the armatures of relay 21 and magnet 31 are attracted, the latter moving the selecting disk 51 through a small angle. As hereinbefore ex plained, the current passing through the holding windings of the-relays andmagnets is suflicient to hold any of the armatures ductor L, the armature 2 again moves against the front contact 4 and current flows from grounded battery 3, contact 4, ring 5, seg-- ment' 14, conductor 39, in multiple through relay'24 and selecting magnet 34 to ground. The relay 24 and the magnet 34attract their' 'armatures, the latter moving the disk 54 througha small angle. The armatures are retained in attracted position as hereinbefore no current flows from the distributer. The movement of the disks 51 and 54 has pre-.

described. The fifth impulse being negative,

sented a continuous vertical line of slots. 56 I before the selecting lever 65 which corresponds to the position. of the character D upon the type wheel 45-.

After the outer brushes of the arm 7 have ing winding \vhich returns &

inner-brushes from battery 9, ring 8, commutator bar 10, conductor .90, in multiple through the operating windings of relay 26 and release magnets 78'and 79 to ground. The magnets 78 and 79 raise the inner ends of the release levers 72 and 73, but, since as hereinbefore described, none of the levers are before a continuous line of slots, none of the ends of said levers are raised. The attraction of the armature of relay 26 completes the circuit just traced through the space relay 157 and the start control relay 92. The start, control relay 92 is very rapid in its operation and opens the circuit for the starting magnet 94, before the same has time to attract its armature, thus preventing the rotation of the type shaft. The attraction of the armature of the space relay 157 closes a circuit from ground at the armature of carriage retur relay. 133, armature and front contact of space relay 157, operating winding of space-lock relay, 107, winding of the clearing out relay 80, and battery'81 to ground. The clearing out relay and the space lock relay 107 attract their armatures, .the former opening the circuit for the holdthe displaced armatures to normal position, and the latter causing the operation of'the space magnet 131 as hereinbefore described.

It will be.n0t-ed that the characters carried by the type wheel'415 are in two horizontal rows and that the upper row is normally in a position to present its characters to the printing platen 111. If it is desired to print any character from the lower row, a series of impulses is imparted over the line conductor to cause the operation of a. shift magnet 170. This is accom- "plished by the transmission of five impulses composed of two positives, a negative and two positives. The positive impulses cause the consecutive closing of circuits through the relays 21, 22, 24 and 25 and the selecting The operation of the selecting magnets, however, does not cause a" continuous vertical line of slots in the selecting disks to be presented before any selecting lever 65, and consequently none can become operative. The operation ofthe relays 21, 22, 24 and 25 prepares a circuit from battery 160, armatures and front contact of relays 21 and 22, armature and back contact of relay 23, conductor 171, figures relay 172, conductor 173, front contacts and armatures of relays 24 and 25, coil of start-control relay 92, to armature of relay .26. This circuit iscompleted upon the energization of the relay 26 by current passing from battery 9 through the ring 8 and the commutator bar 10 as hereinbefore ,described. vVhen the relay 26 attracts its armature, current flows through the figures relay 172 which attracts its armature, closinga circuit. from battery 81, winding of the ,acters to the printing platen.

clearing out relay 80, conductor 108, resistance 165, conductor 174, armature of the figures relay 1,72, conductor 175, winding of a figures-lock relay 176, armature of a letters relay 177, conductl'. 178, armature and back contact of carriage-return relay 133, to

ground. The clearing out relay 80 and the figures-lock relay 176 attract their armatures, the operation of the latter causing the closing of a circuit from battery 180, winding of shift magnet 170, armature and winding of figures-lock relay 176, armature of letters relay 177, conductor 178, armature and back contact. of carriage-return relay 133 to'ground. The operation of the former removes the current from the holding windings of the operated relays and magnets,.rcturning this a paratus to normal. The currentfiowing t rough the shift magnet 170 causes .it to attract its armature 185, forcing a roller 186 upward, and since 'the type Wheel rests thereon, the type Wheel is moved upward to present the lower row of char- The action of the figures-lock relay 176 causes the continned energization of the shift magnet 17 0 until current is sent over the line, to cause the unshifting thereof, or until the'carriage is returned to its normal position.

.The unshifting is accomplishe'dby sendingfive positive impulses over the line conductor, causing the attraction of the armatures of all, the relays 21, 22, 23, 24 and 25. Upon the energization of relay 26 a circuit iscompleted from battery 160, front con- 1 tacts and armatures of relays 21., 22, and 23, conductor 187, letters relay 177, conductor 173, front contacts and armatures of relays 24=and 25, winding of the start-control relay 92, armature and 'front'contact of relay 26v to ground. The letters relay 177 attracts its armature, opening the circuit through the figures-lock relay 176, dee'nergizing the I shift magnet 170 whereupon a spring 183' lowers the roller 186, which allows the type wheel. 15 to assume its normal position in which the upper row of type is presented to the platen.

To return of a line a series of impulsesis transmitted whereby the relay 24 is caused to attractits unnature. After the operation ofrelay 26 a circuit is closed from battery 160, backcontacts'and armatures of relays 2'1, 22 and 23, conductor 190, carriage return relay 133, operating Winding of carriage-lock relay 191, conductor 192, armature and front contact of relay of relay 25, winding ofstart-control relay 92, arlnature'and front contactof relay 26 to/ ground. The attraction of the armature of the carriage return relay 133 completesthe carriage to the beginning 241, armature and back contact a circuit from ground at armature and front contact of carriage-return relay 133, conductor 108, clearing out relaySO, battery; 81 1'30 to ground. The action of the clearing out relay 80 causes the selecting apparatus to he returned to its normal position. The traction of the armature of carriage-returnlock relay 191 causes the closing of a circuit from ground tl'irough the holding winding, armature and front contact of carriageafe turn-leck relay 191, conductor 195,.carriage return magnet 196, togrounded battery 19?. The carriage-returndock relay 191 is, there fore, held in its operated position until the carriage has completely returned, whereupon the holding circuit therefor is'opened as hereinafter described. The energization of the carriage-return magnet 196 causes the attraction of armature "198 thereof, which removes a holding pawl 199 from the teeth of a ratchetwheel 137. The energy stored up in. the spring 143 during the forward movement of the carriage thereupon becomes effective to return the carriage to the begin ning end of a liner i' LS llhG limit of the carriage return is reached', an insulating pin 201 carried by the ratchet wheel 13? causes the engagement of contact springs 202, which short circuit the holding winding of the ca rriage-return-lock relay 191 through a conductor 20- The carriage-relurn-lock relay is thereupon dcZincrgiz-cd and the carriage return magnet 1.90 releases the holding pawl 199 which becomes effective to arrest the return movement as the carriage stepped forwardfora line of print. II

If the figure-lock relay lib had been energized at the time of the transmission of current for the return of the paper carriage, the energizing circuit thereof would have been-broken by the armature and front contact of the carriage-leturn relay 133. it

will, therefore, beunderstood that the upper row of characters is always presented to the printing platen upon the return of the paper carriage lo the beginning end of a. line.

'In order to feed the paper from line to 5 line, it is necessary to cause the cncrgization of a line feed relay 210 which, upon the attraction of its armature, closes a circuit. from ground at armature and front contact of the relay .210. conductor 211, line feed magnet 212, battery- 2123' to ground. The energlzation of the line feed magnet 2H2 causes the attraction of armature 21 1 and thereupon a stepping pawl 21:) engages a ratchet wheel 216 which is firmly secured to the rod 141, rotating the paper carriage. lVhen the armature 21 ireaches the limit of its movemei'it, an insulating pin 2.18 car ried thereby causes the engagement of contact springs 21.9 which effects a dctinergization of the coils of the line feed magnet by completing a circuit tl'irough the conductors 174i and 108 and the winding of clearing-out relay -80, battery iii to ground. N The clearing-out relay attracts its armatures, breaking the holding circuit for the energized relay and magnets and the appa ratus is restored to its normal position.

ll hat I claim is:

1. ii printing telegraph receiver compr sing a rotating type wheel shaft, a plurality of pivoted notched disks surrounding said ft, a plurality of pivoted spring-tensioued levers grouped about said shaft and cotipei-ating therewith and with said disks to selectively arrest said shaft, a release magnet, a lever actuated by said magnet noinially acting-0n said pivoted levers against their spring tension to prevent co operation with said shaft and said disks but arranged to become inactive to allow cooperati n between said shaft, pivoted levers and difks.

2. A printing telegraph receiver comprising a rotatable type wheel shaft, an arm thereon, a, plurality of movable notched disks encircling said shaft, a plurality of pivoted levers having two extensions one cooperating with said disks and the other projecting centrally to cooperate with said arm whereby said disks may selectively present a, continuous line of notches before one of .said levers to arrest said shaft, a pair of release magnets, and a lever actuated by each of said magnets having centrally projccting portions normally acting upon the cent-rally extending portions of said pivoted levers to prevent the cooperatioq'of said disks, pivoted levers and arm, but arranged to be actuated upon the energization of. said magnets to allow cooperation of said disks, pivoted levers and arm whereby said shaft may be selectively arrested.

in a printin; telegraph receiver, the combination of a current distributor, a plurality of circuits connected thereto, magnets in said circuits, a plurality of pivoted. disks, one for each magnet and controlled thereby, a rotatable type shaft carrying the charac ters, a plurality of levers selectively controlled by the relative position of said disks, and a release magnet for allowing the selected lever to become operative to arrest the shaft in a position. to print any character. I

i. in a printing telegraph receiver, the combination of a current distributer, a plurality of circu ts connected thereto, magnets in said circuits, a plurality of pivoted disks, one for each magnet and controlled thereby,

u 1': tatable type shaftcarrying the characters, a plurality of spring tensioned levers selectively controlled by the relative position of said disks, and a release magnet in one of said circuits operable to allow a se lected one of said spring tensioned levers to croperate with said shaft to present any character for printing.

5. in a printing telegraph receiver, a current distributor, a pluralityof'branch circuits connected thereto, type selecting magnets and operation controlling relays in said In Witness whereof, I hereunto subscribe branch circuits, a rotatable type shaft carmv name this 4th day of January A. 1)., l3

rying characters to be selected, means for 1913. starting, the rotation of said shaft, and a start control relay actuatedto prevent the AMOS F. DIXON. operation of. said starting means upon the lrVitnesses:

7 operation of predetermined operation con- WALTER F. HOFFMAN,

trolling relays. O. D. M. GUTHn.

copies 0! this natent may be ob'tained for five cents eachpby addressing the Commissioner of Patents Washington, D. C. 

